Openab

OpenAB — Open Agent Broker

[](https://github.com/openabdev/openab) [](https://github.com/openabdev/openab/releases/latest) 


A lightweight, secure, cloud-native ACP harness that bridges **Discord, Slack**, and any [Agent Client Protocol](https://github.com/anthropics/agent-protocol)-compatible coding CLI (Kiro CLI, Claude Code, Codex, Gemini, OpenCode, Copilot CLI, etc.) over stdio JSON-RPC — delivering the next-generation development experience.

🪼 **Join our community!** Come say hi on Discord — we'd love to have you: **[🪼 OpenAB — Official](https://discord.gg/YNksK9M6)** 🎉

┌──────────────┐  Gateway WS   ┌──────────────┐  ACP stdio    ┌──────────────┐
│   Discord    │◄─────────────►│              │──────────────►│  coding CLI  │
│   User       │               │    openab    │◄── JSON-RPC ──│  (acp mode)  │
├──────────────┤  Socket Mode  │    (Rust)    │               └──────────────┘
│   Slack      │◄─────────────►│              │
│   User       │               └──────────────┘
└──────────────┘

Demo


Features

• Multi-platform — supports Discord and Slack, run one or both simultaneously
• Pluggable agent backend — swap between Kiro CLI, Claude Code, Codex, Gemini, OpenCode, Copilot CLI via config
• @mention trigger — mention the bot in an allowed channel to start a conversation
• Thread-based multi-turn — auto-creates threads; no @mention needed for follow-ups
• Edit-streaming — live-updates the Discord message every 1.5s as tokens arrive
• Emoji status reactions — 👀→🤔→🔥/👨‍💻/⚡→👍+random mood face
• Session pool — one CLI process per thread, auto-managed lifecycle
• ACP protocol —